Oxyna gansuica Wang, 1998

Han, Ho-Yeon, 2019, Ten species of the subfamily Tephritinae (Insecta: Diptera: Tephritidae) newly recorded in Korea, Journal of Species Research 8 (3), pp. 294-312 : 305-306

7. Oxyna gansuica Wang, 1998

ű÷üŭẖṻƞ (ṵḍ) ( Fig. 6A- F ) Oxyna gansuica Wang 1998: 282 (type locality - China, Gansu, Zhangye ; holotype ♂, IZAS), 280 (in East

Asian Oxyna key); Korneyev and Ovchinnikova, 2004: 535 (in Russian Far East key).

Diagnosis. This species can be readily distinguished from any other Korean Oxyna species by its unique wing pattern with tiny yellowish or hyaline spotted dark brown background and the following two hyaline areas ( Fig. 6A- C, E ): 1) subbasal hyaline area with few tiny dark spots, covering most of anal lobe, cell cu 2 excluding short basal and apical areas, middle half of cell dm, middle 1/3 of cell br between crossveins BM-Cu and R-M; and 2) uninterrupted hyaline subapical longitudinal band. This species appears somewhat similar to European O. obesa Loew, 1862 [see Korneyev and Hidalgo (2013) for photographs of the holotype female], but O. gansuica can be readily distinguished by having the white posterior notopleural seta as well as the subbasal hyaline area not extending anterior to vein R 4+ 5.

Description of Korean material. Wing length 4.8-4.9 mm; most setae on head and thorax dark brown, but most setulae white; head and legs predominantly pale yellowish brown, but thorax and abdomen matte brown. Head pale yellowish brown except dark brown occipital area; with moderate sized geniculate mouthparts; with single dark brown frontal setae; anterior orbital seta dark brown but posterior seta white, half as long as anterior seta; ocellar seta dark brown, as long as frontal setae. Thorax and preabdomen look matte brown due to dark brown ground color with heavy brown to yellowish brown pruinosity; dark brown anterior notopleural seta strong; white and thick posterior notopleural seta slightly shorter than anterior one; upper anepisternal seta strong, dark brown but lower anepisternal seta white, about 3/5 as long as upper one; scutellum bare in middle with apical setae crossed, about 2/3 as long as basal seta. Legs yellowish brown; fore femur with basally 4-5 white and apically 2 dark brown postero-ventral setae; mid coxal seta strong, white. Wing tiny yellowish brown to hyaline spotted dark brown background with the following two hyaline areas; subbasal hyaline area (with few tiny dark spots) covering most of anal lobe, cell cu 2 excluding short basal and apical areas, middle half of cell dm, middle 1/3 of cell br between crossveins BM-Cu and R-M; hyaline subapical longitudinal band uninterrupted. Abdomen matte brown; oviscape shiny black, about as long as two preceding abdominal tergites.

Material examined. KOREA: Gangwon-do : Jeongseon-gun , Nam-myeon , Mt. Mindungsan, from Yupyeong-ri to 1119 m peak, N37°16 ʹ 15 ʺ E128°46 ʹ 30 ʺ, 6.VI.2006, H.Y. Han et al., 1$( NIBR); ditto, 17.VI.2011, 1♂ ( YSUW) .

Distribution. Korea, China (Gansu).

Biology. Unknown.

Remarks. The genus Oxyna is notorious for its taxonomic difficulties due to high intra-specific but low inter-specific variation. In Korea, there are three recorded species of Oxyna [ O. amurensis Hendel, 1927 , O. lutulenta (Loew, 1860) , and O. parietina ( Linnaeus, 1758) ], among which O. parietina could only be safely identified at the moment. The newly recognized, O. gansuica is the second species that can also be clearly identified. According to our combined morphological and molec- ular analysis based on many samples, there are at least five species of Oxyna in Korea. A more rigorous taxonomic study is underway for the Korean species (Han and Ro, in preparation). The new Korean name of this species refers to its type locality, Gansu, China.

Figures

Fig. 6. Oxyna gansuica Wang, 1998. A. male, dorsal view; B. female, dorsal view; C. male, lateral view, D. male, dorsal view; E. female, lateral view; F. female dorsal view.